Remove note about event access in ERC1967Utils.sol

[Sabnock01]

Fixes #4860

Removes the now non-applicable comment in ERC1967Utils.sol on events being redeclared in the file prior to 0.8.20 which allows qualified event access from external contracts. The comment is no longer applicable since ERC1967Utils.sol was transitioned from an abstract contract to a library and now does not inherit IERC1967.sol.

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Latest commit: 901b624

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[ernestognw]

Thanks @Sabnock01